[media] uvcvideo: Fix a "ignoring return value of ‘__clear_user’" warning

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/drivers/media/video/uvc/uvc_v4l2.c b/drivers/media/video/uvc/uvc_v4l2.c
index 111bfff1640dff0b8f26b0d09760e9b8daf1b9b1..4ef21e9cb28cea909bb4dd0ffef03d82b0539220 100644 (file)
--- a/drivers/media/video/uvc/uvc_v4l2.c
+++ b/drivers/media/video/uvc/uvc_v4l2.c
@@ -1097,7 +1097,8 @@ static int uvc_v4l2_put_xu_mapping(const struct uvc_xu_control_mapping *kp,
            __put_user(kp->menu_count, &up->menu_count))
                return -EFAULT;
 
-       __clear_user(up->reserved, sizeof(up->reserved));
+       if (__clear_user(up->reserved, sizeof(up->reserved)))
+               return -EFAULT;
 
        if (kp->menu_count == 0)
                return 0;